A simple calculator that helps you in calculating the vehicle speed error from the values of traffic speed, central frequency and transmit or offset frequency. The calculator first determines the measured vehicle speed from which the vehicle speed error is estimated.
Consider the traffic speed be 8 and the central frequency be 5 and the Transmit frequency be 4. Calculate the vehicle speed error.
Measured Vehicle Speed = (Offset Frequency × Traffic Speed) / Centre Frequency
= 4 x 8 / 5
Vehicle Speed Error = Measured Speed - Traffic Speed
= 6.4 - 8